Marting-ale-king



UNITED STATES PATENT OFFICE.

DE WITT C. LOCKWOOD, OF DERBY, CONNECTICUT.

MARTINGALE-RING.

Specification of Letters Patent No. 30,233, dated October 2, 1860.

T o all whom it may concern:

Be it known that I, DE I/VITT C. LooKwooD,

Rings; and I do hereby declare that the following 1s a full, clear, and exact description of the same, reference being had to the accompanying' drawings, forming part of this specification, in which- Figure l represents a transverse section of my improved ring. Fig. 2, represents a perspective view of the same. Fig. 3 shows an edge view of the same. Fig. 4l, is a perspective View of the wooden ring A. Fig. 5 illustrates a mode of making my invention.

Similar characters of reference denote the same part in the several figures.

My invention relates to an improvement in metallic lined martingale rings; having for its object, a cheaply constructed article which shall be more durable than those in common use. And to these ends my said invention consists, in interlocking with one or both sides of the ring its metallic lining substantially as hereinafter fully set forth.

I will proceed to describe my invention, and a mode of producing it.

In the accompanying drawings, A, is a ring` of colored wood or of ivory (or it may be made of an cheap material of moderate strength), which ring has upon each side, at or near its inner edge, a bead a and a.

B is a lining of sheet metal which fits the interior of the ring A, and extending up the sides of the beads a and ai is bent in over the top of the said beads, as represented in the drawings, and is thus interlocked with the sides of the ring A, in such a manner that if the ring A, be broken transversely into many pieces the said pieces will be firmly held together, and will be prevented from falling away from each other and from the lining ring B, thus rendering the martingale ring serviceable when the wooden ring A, is broken.

By interlocking the lining ring with the sides of the wooden ring A, in the manner described the said wooden ring is strengthened to resist stretching as well as breaking strains.

The parts of the ring which are subject to wear are well protected by the lining B.

A cheap method of constructing my invention is as follows: The lining ring B, is formed from sheet metal spun 7 or pressed irst into the shape shown in Fig. 5, (which is a sectional View) namely-a cylindrical tube with its lower end flaring and turned up on the outside. The turned wooden ring A, is forced down over the cylindrical part of the aforesaid tube its bead a fitting into the recess b, formed by the turned up edge of the tube; and the tube will project far enough through the ring A, to allow its upper end to be flared out and turned down tightly onto the bead a. This flaring and turning over of the lining B, I effect in a lathe by a burnishing process termed spinning.

I do not wish to limit my claim of invention to the precise form of the parts represented, so long as the novel feature of my said invention is retained; nor do I wish to be understood as claiming the use of a metallic lining or strengthening ring, as such has been in use before, nor do I claim any particular mode of manufacturing my invention; but

lVhat I claim as my invention, and desire to secure by Letters Patent, is-

As a new article of manufacture a martingale-ring having its metallic lining interlocked with its sides substantially as and for the purpose hereinbefore specified.

D. C. LOCKVOOD.

Witnesses THOMAS B. DE FOREST, HORACE ANDREWS. 

